Orange - if 5,000 Kelvin
because since its very hot the hotter it gets it starts to melt the color on the star.For Example blue stars. there the hottest star.
O B A F G K M are the letters used to identify the spectrum of stars. The spectrum goes in order from hottest to coolest, "O" stars being the hottest, "M" stars being the coolest. In color ranking: O...
YES!
It is related to how the gravity affects the temperature to the color and of o the star.